Fly Fishing in Winter

"The forecast is snow overnight tonight, windchills of -5 (Farenheit) and 10 to 15 mile per hour winds. Sounds like perfect fly fishing weather." Dean Burris, Purcellville, Virginia

Ever try fly fishing in freezing weather? I came across Dean Burris' blog just now. His felt soles got stuck on the rock he was standing on and his guides iced up every retrieve. Then he went back for more.